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(No Model.) 4 Sheets-Sheet 1. D. W. PAYNE.

VALVE GEAR.

No. 407,031. Patented July 16, 1889.

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' D. W PAYNE.

VALVE GEAR.

No. 407.031. Patented July 16, 1889.

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(-No Model.) 4 Sheets-Sheet 4. D. W. PAYNE. VALVE GEAR.

No. 407,031. 1 Patented July 16, 1889.

g (y f Ess l I v Afforney UNITED STATES PATENT OFFICE.

DAYID XY. PAYNE, OF ELMIRA, NE\Y YORILASSIGNOR TO B. WV. PAYNE & SONS, OF SAME PLACE.

GEAR.

SPECIFICATION forming part of Letters Patent No. 407,031, dated July 16, 1889.

Application filed August 3, 1887.

T0 all whom, it may concern.-

Be it known that I, DAVID IV. PAYNE, a citizen of the United States, residing at Elmira, in the county of Chemung, State of New York, have invented certain new and useful Improvements in Valve-Gears, of which the following' is a specification, reference being had therein to the accompanying' drawings.

The object of this invention is to combine a shaft or wheel-governor with the Uorliss wrist-plate motion and use in the combination separate supply or cut-off and exhaust valves actuated by separate eccentrics on the Inain shaft, (in which case the supply-valves or cutott would be connected to the shaft or wheelgovernor.) In this case the lead, release, and compression would be fixed and only the cutott variable, and the supply or cut-oit valves would be controlled by the Corliss Wristplate motion, which would itself be controlled by the operation of the shaft or wlIeel-governor. Furthermore, I may, in furtherance of the object of this invention, for simplicity place the supply-valves at the bottom of the cylinder and the cut-off valves within the main or supply valves; or I Inay place the cut-off valves at the top of the cylinder and the exhaustvalves at the bottom thereof, or reverse the relative positions of the valves from that just Inentioned. In other vwords, there may be four valves-two supply and two exhaustor there may be only two valves, each performing the functions of admission, cut oit, release, and compression. In this instance I have shown rotary or oscillating valves; but it is evident that reciprocating or sliding valves may be substituted therefor. It is well known that the Oorliss wrist-plate Inovement has a rocker mounted on an arm projecting' from the cylinder or frame and actuated by an eccentric or cam. The rocker is connected by rods to cranks on the valvestems. The connections are so placed that the motion communicated through them to the valves shall be the most rapid at times of steam admission and cutting oIl and slower when they are lapped or the exhaust open. By these Inotions quick and free admission, sharp cut-oit, and tree release are obtained.

An arrangement for releasing the supply- Serial Nc. 246,059. (No model.)

Valves from connection with the wrist-plate when cut off should take place is provided, and to insure a quick cutoff daslrpots or their equivalents are connected to the valves or their cranks. This construction limits the engine to a comparatively low rotative speed. Now, by combining the wrist-plate Inotion with the shaft or wheel-governor and dispensing with the releasinggear and dash-pots,thc engine enabled to attain much higher Iotative speed, its construction is simplified, the cost thereof reduced, and the development of much greater power from cylinders of equal diameters is accomplished.

Referring to the drawings, Figure lis a side elevation of an engine embodying my invention. Fig. .2 is a plan of the cylinder and adjacent parts on an enlarged scale. Fig. 3 is a front elevation of a set of double rotary valves and their connections with the wristplates. Fig. 4. is an enlarged vertical section of the cylinder with double valves arranged at the bottom thereof. Fig. 5 is a transverse section of the cylinder, taken longitudinally through one of the double valves.

Like letters of reference indicate like parts throughout the figures of the drawings.

A represents a cylinder, projecting `from which or from any suitable part of the framework is a journal or stud B, on which the wrist-plate I3 is mounted.

C O are cranks Inounted upon the Valvestem D, and E E represent rods connecting said crank with the wrist-plate.

F represents an eccentric-rod removably connected with the wrist-plate by being recessed in the usual Inanner to receive and retain the rod-block or pin F', which is Inounted on the wrist-plate.

G represents the Inain or crank shaft of the engine, to which the connectiIIg-rod G and piston-rod G2 are connected in the usual manner. Upon the shaft are loosely mounted the arms II Il, constituting a part of the shaft or wheel-governor, the outer ends of these arms being connected by a rod IP with arms H3, pivoted, as at II, to the wheel I, mounted upon thc shaft G.

Veights .I are mounted for movement along the rods IIS, and springs J are connected to IOO the rod and to the spokes I or other portion of the Wheel I. The arm II is provided with a pin H5, which may be provided with an anti-friction roller, which is projected into the curved slot L of the eccentric-carrying plate` L. The eccentric M is formed on or attached to a face of the plate L and is slotted for movement across the shaft.

In Fig. l is shown a particular form of shaftgovernor which may be used with a single eccentric or two eccentrics. Vhere tWo eccentrics are used and the main valve performs the function of admission and the other valve that of cutting off, the governor mechanism may be attached to an eccentric on the' shaft. I do not confine myself to any particular forni of shaft-governor, but contemplate the use of any of the various forms desired.

Instead of the particular form of governor described, the eccentric operating the admission-valves may rotate on the shaft, thus changing the angular advance, as in the Thompson gear.

The strap M2 serves to connect the eccentric-rod F with the eccentric in the usual manner.

In Fig. l I have illustrated a pin N, to which the eccentric-rod is connected, although it is apparent that said rod may extend directly from the wrist-plate to the eccentric, as shown in other figures of the drawings.

In Figs. 2 and 3 I have illustrated upon a larger scale the provision of double valves and the connection of each separate valve with a separate eccentric. In this instance there are extended from the side of the cylinder (and it may be either upon the top or the bottom thereof, in accordance with the desired location of the valves) brackets O, which serve as the bearing for the valve-stems D D', respectively. The cranks C of the valves D are connected to the wrist-plate B by means of rods E, and said wrist-plate is connected by means of the rod-block F with the eccentric-rod F2 in such a manner that by raising or lowering the handle F thereof it may be connected or disconnected at will with the Wrist-plate. This particular construction is simply a matter of convenience to permit of disconnecting the eccentric-rod from the Wrist-plate. The connection may be made permanent or so as to disconnect at will, as desired. These exhaust-valves are actuated by a fixed eccentric M. This eccen tric is of the ordinary type and is connected to the exhaust-valves by the eccentric-rod F2, as shown in Fig. 2. The end of F2 fits over the pin F on the oscillating plate B, and thence the motion is carried to the exhaustvalves by the arms E, Figs. 2 and 3. In this instance the cutoff valves are arranged Within the exhaust-valves, and the stems D of the former extend through the stem and cranks D of the latter, and are cach provided with a crank C and connected by means of rods E to the second Wrist-plate B2, which is connected and operated by an eccentric-rod F and shifting eccentric M. This shifting eccentric actuates the inner cut-off valve only and enables the cut-off to be varied independently of the exhaust and compression.

In an arrangement of the valves at the bottom of the cylinder I employ the construction illustrated more particularly by Figs. 3, et, and 5; but it Will be apparent that a mere reversal of these constructions Will adapt the parts for a use of the valves at the top of the cylinder. At each end of the cylinder there is a port A', communicating directly with a cylindrical valve-seat A2, in the Walls of which there is formed a port A3, communicating with the exhaust-passage A4. Another larger port A5 affords communication between the Valve-seat and the supply-chamber A, With Which at any suitable point the live-steam or supply pipe may be connected, as shown by the dotted lines in Fig. 4.

The double valve consists of a hollow cylinder P, having a spindle D, and Within the cylinder is arranged the inner or cutoff valve Q, having the spindle or stem D passing through the spindle D and projecting beyond the same. The valve P has an opening I2', adapted to be brought in communication With the port A5, and an openin g P2, adapted to be brought into communication with the port A. It also has a peripheral recess P3, adapted to be brought into communication With both the ports A and A3. The valve Q is recessed to stride the spindle D', so as to partake of its motion, and is adapted to close the port- P2. These constructions may be varied as desired.

As shown' in Fig. 4, the supply is cut off at one side of the piston-head while the exhaust is taking place from in front of the piston. Now it Will be readily seen that the variations in the load put upon the engine will affect the shaft or Wheel-governor in such a manner as to vary its operation upon the eccentric M and its rod F, and that these variations Will be directly communicated to the Wrist-plate, and from thence through the connecting-rod to the valve-stems, so that, having once been properly adj usted in their relative movements as to time and distance, the valves are under the most direct and accurate control of the governor and readily partake of the slightest effects of the variations of the governor.

R represents strips of packing, of any suitable kind or nature, seated in the periphery of the valve Q and around the opening T thereof, the object of Which is to take the larger part of the Wear or friction of the valve upon its seat and to compensate for such Wear and maintain a steam-tight connection between the valve and its seat.

Having described my invention and its operation, What I claim is l. The combination of a fixed eccentric, a Wrist-plate, and admission and exhaust valves connected with said Wrist-plate with a cutoff', a Wrist-plate, and a shifting eccentric di- IOO IIO

leetly eonneeed with each other, subsmw and xed eccentric M',Substantiallyns Speeltidly :1S described. v fled. Io

2. The eon'lbnaton, with the Cylinder A, In testimony whereofl af'x mysignature in having the ports A A3, comlmmiezlting with presence of i'Wo Witnesses'.

5 vulve-seats A2, of the Valves I.) :md Q, the lat- DAVID PAYNE.

ter arranged within the formel', Valve-stems 'llesses: D D, Connecting-mds E ,.1, Wrist-plaies B and HARRIS TABOR,

B2, eccentric-rods F F?, Shifting eccentric M, l EDWARD C. VAN DUZER. 

